Re: Export Complex Matrices
- To: mathgroup at smc.vnet.net
- Subject: [mg40747] Re: Export Complex Matrices
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Wed, 16 Apr 2003 01:35:01 -0400 (EDT)
- Organization: Universitaet Leipzig
- References: <b7ge8q$djp$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
- Sender: owner-wri-mathgroup at wolfram.com
Hi,
I don't know for what system you have to export the data.
If you just want to save it and reread it in Mathematica
Put[COO,"data.m"]
and
COO=Get["data.m"]
may be a good solution.
The CSV format may also help you
Export["COO.dat", COO, "CSV"];
!! COO.dat
gives
2,3,2.E-9
3,2,2.*^-9*I
Regards
Jens
Kyriakos Chourdakis wrote:
>
> Dear all,
>
> I am trying to export matrices of the form
>
> COO = {{2, 3, 2. 10^-9}, {3, 2, 2. 10^-9 I}}
>
> with I the imaginary unit. It is the coordinate
> representation of large sparse matrices. The first two
> columns are the coordinates, and the third is the
> value. When I use the simple
>
> Export["COO.dat",COO]
>
> I guess Mathematica recognises the imaginary part as string,
> and exports
>
> 2 3 2.e-9
> -9
> 3 2 2. 10 I
>
> instead of
>
> 2 3 2.e-9
> 3 2 2.e-9 I
>
> I am sure there is a simple way to get around the
> problem, but I can't find it..
>
> I am using Mathematica 4.0 on Windows Me.
>
> Best
>
> K.
>
> __________________________________________________
> Yahoo! Plus
> For a better Internet experience
> http://www.yahoo.co.uk/btoffer